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The universal program of nonlinear hyperelasticity

Abstract:
For a given class of materials, universal deformations are those that can be maintained in the absence of body forces by applying only boundary tractions. Universal deformations play a crucial role in nonlinear elasticity. To date, their classification has been accomplished for homogeneous isotropic solids following Ericksen’s seminal work, and homogeneous anisotropic solids and inhomogeneous isotropic solids in our recent works. In this paper we study universal deformations for inhomogeneous anisotropic solids defined as materials whose energy function depends on position. We consider both compressible and incompressible transversely isotropic, orthotropic, and monoclinic solids. We show that the universality constraints—the constraints that are dictated by the equilibrium equations and the arbitrariness of the energy function—for inhomogeneous anisotropic solids include those of inhomogeneous isotropic and homogeneous anisotropic solids. For compressible solids, universal deformations are homogeneous and the material preferred directions are uniform. For each of the three classes of anisotropic solids we find the corresponding universal inhomogeneities—those inhomogeneities that are consistent with the universality constraints. For incompressible anisotropic solids we find the universal inhomogeneities for each of the six known families of universal deformations. This work provides a systematic approach to study analytically functionally-graded fiber-reinforced elastic solids.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1007/s10659-022-09906-3

Authors


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Institution:
University of Oxford
Division:
MPLS
Department:
Mathematical Institute
Oxford college:
St Catherine's College
Role:
Author
ORCID:
0000-0002-6436-8483


Publisher:
Springer
Journal:
Journal of Elasticity More from this journal
Volume:
154
Issue:
1
Pages:
91-146
Publication date:
2022-07-20
Acceptance date:
2022-06-06
DOI:
EISSN:
1573-2681
ISSN:
0374-3535


Language:
English
Keywords:
Pubs id:
1262502
Local pid:
pubs:1262502
Deposit date:
2022-06-07

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